Dodge RAM 1997 1500 Van V6 3.9L, RAM 1997 1500 Van 3.9L Workshop Manual

dodge :: Dodge Truck RAM 1500 Van V6-3.9L
VIN X (1997)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Audio Control Relay > Component Information > Description and Operation

Audio Control Relay: Description and Operation
CIRCUIT OPERATION

The radio speaker relay and filter choke supplies voltage to the amplifier circuits in the speakers. The radio supplies power to the coil side of the relay on circuit X60. Circuit Z1 provides ground for the coil side of the relay

Circuit F31 from fuse 2 in the fuse block supplies power to the contact side of the relay. Circuit A3 from fuse 14 in the Power Distribution Center connects to the fuse block bus bar that feeds circuit F31 through fuse 2. Circuits A3 and F31 are HOT at all times.(PDC)

When the radio supplies power for the coil side of the relay, the contacts close and connect circuits F31 and X13. Circuit X13 supplies voltage tothe amplifier circuits in the speakers. Circuit X15 provides ground for the amplifier circuit of the speakers.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Description and Operation

Keyless Entry Module: Description and Operation
SYSTEM OPERATION

Power Lock And Remote Keyless Entry Module (RKE)

The power lock and Remote Keyless Entry module is mounted on the dash panel beneath the instrument panel, above the heater-A/C airdistribution duct and between the two defroster outlets. This module contains the RKE receiver, and the RKE and illuminated entry systemprogram logic. The module also performs as a smart relay for the power door lock, RKE, and illuminated entry systems.

The remote keyless entry receiver has a memory function to retain the vehicle access code of at least one, but no more than two transmitters. Thereceiver is designed to retain the transmitter codes in memory, even if the battery is disconnected.

The module receives inputs from the ignition switch, the power door lock switches, and the side/ rear cargo door jamb switches. It also receivesthe radio signal input from the remote keyless entry transmitter. In response to those inputs, it is programmed to control outputs to the power lockmotors and the courtesy lamp circuits.
The power lock and remote keyless entry module cannot be repaired and, if faulty or damaged, it must be replaced.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Description and Operation > Page 10

Keyless Entry Module: Testing and Inspection

1. Check the circuit breaker in the fuseblock module. If OK, go to Step 2. If not OK, replace the faulty circuit breaker.2. Check for battery voltage at the circuit breaker. If OK, go to Step 3. If not OK, repair the open circuit to the Power Distribution Center as required.3. Disconnect and isolate the battery negative cable. Access the power lock and remote keyless entry module wire harness connectors as described.4. Unplug the wire harness connectors from the module. Check the connectors and the receptacles in the module for loose, corroded, or damaged
terminals and pins. If OK, go to Step 5. If not OK, repair as required.

5. Probe the ground circuit cavity of the black module wire harness connector and check for continuity to a good ground. There should be continuity.
If OK, go to Step 6. If not OK, repair the circuit to ground as required.

6. Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the black module wire harness connector. If OK,
go to Step 7. If not OK, repair the open circuit to the fuse- block module as required.

7. Probe the door lock switch output (lock) circuit cavity of the black module wire harness connector and check for battery voltage as you actuate
either, or both, lock switch(es) to the Lock position. If OK, go to Step 8. If not OK, repair the open circuit to the lock switch(es) as required.

8. Probe the door lock switch output (unlock) circuit cavity of the black module wire harness connector and check for battery voltage as you actuate
either, or both, lock switch(es) to the Unlock position. If OK, go to Step 9. If not OK, repair the open circuit to the lock switch(es) as required.

9. Check for continuity between the door jamb switch sense circuit cavity of the black module wire harness connector and a good ground with both
the side and the rear cargo doors closed. There should be no continuity until the side or rear cargo doors are opened. Check both the side and reardoors. If OK, go to Step 10. If not OK, repair the open circuit to the door jamb switch(es) or replace the faulty door jamb switch(es) as required.

10. Check for battery voltage at the fused ignition switch output circuit cavity of the blue module wire harness connector with the ignition switch in the
On position. If OK, turn the ignition switch to the Off position and go to Step 11. If not OK, repair the open circuit to the fuseblock module asrequired.

11. Plug the wire harness connectors back into the module. Backprobe the door latch switch sense circuit cavity of the black module wire harness
connector and check for continuity to a good ground. There should be no continuity. Press and release the Unlock button of the remote keylessentry transmitter. There should now be continuity for about thirty seconds. If OK, go to Step 12. If not OK, replace the faulty module.

12. Backprobe the door lock driver circuit cavity of the black module wire harness connector and check for battery voltage as the lock switch is moved
to the Lock position. Repeat the test pressing the Lock button of the transmitter. If OK, go to Step 13. If not OK, replace the faulty module.

13. Still backprobing the door lock driver circuit cavity of the black module wire harness connector, open the side or rear cargo door. Move the lock

switch to the Lock position or press the Lock button of the remote keyless entry transmitter. Now close all of the doors. Within five seconds of theside or rear door(s) closing, there should be battery voltage on the door lock driver circuit. If OK, go to Step 14. If not OK, replace the faultymodule.

14. Backprobe the door unlock driver circuit cavity of the black module wire harness connector and check for battery voltage as the lock switch is
moved to the Unlock position. Repeat the test pressing the Unlock button of the remote keyless entry transmitter. If OK, repair the open circuit tothe lock motor(s) as required. If not OK, replace the faulty module.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Description and Operation > Page 11

Keyless Entry Module: Service and Repair
REMOVAL

1. Disconnect and isolate the battery negative cable.

Instrument Cluster Bezel Remove/Install

2. Remove the six screws that secure the instrument cluster bezel to the instrument panel.3. Pull the bezel off of the upper retaining clips.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Description and Operation > Page

12

RAM 1500 Van V6-3.9L VIN X (1997)

Radio Remove/Install

4. Remove the two radio mounting screws.5. Remove the screw that secures the radio ground strap to the instrument panel above the radio.6. Pull the radio out from the instrument panel far enough to unplug the wire harness connectors and the antenna coaxial cable connector. If equipped
with the Infinity speaker option, also unplug the wire harness connector from the ground terminal on the back of the radio chassis.

7. Remove the radio from the instrument panel.

Power Lock, Remote Keyless Entry Module Remove/Install

8. Reach through the radio opening of the instrument panel and remove the two screws that secure the power lock and RKE module to the dash panel.9. Unplug the two wire harness connectors and remove the module.

10. Reverse the removal procedures to install.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Description and Operation

Keyless Entry Module: Description and Operation
SYSTEM OPERATION

Power Lock And Remote Keyless Entry Module (RKE)

The power lock and Remote Keyless Entry module is mounted on the dash panel beneath the instrument panel, above the heater-A/C airdistribution duct and between the two defroster outlets. This module contains the RKE receiver, and the RKE and illuminated entry systemprogram logic. The module also performs as a smart relay for the power door lock, RKE, and illuminated entry systems.

The remote keyless entry receiver has a memory function to retain the vehicle access code of at least one, but no more than two transmitters. Thereceiver is designed to retain the transmitter codes in memory, even if the battery is disconnected.

The module receives inputs from the ignition switch, the power door lock switches, and the side/ rear cargo door jamb switches. It also receivesthe radio signal input from the remote keyless entry transmitter. In response to those inputs, it is programmed to control outputs to the power lockmotors and the courtesy lamp circuits.
The power lock and remote keyless entry module cannot be repaired and, if faulty or damaged, it must be replaced.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Description and Operation > Page 17

Keyless Entry Module: Testing and Inspection

1. Check the circuit breaker in the fuseblock module. If OK, go to Step 2. If not OK, replace the faulty circuit breaker.2. Check for battery voltage at the circuit breaker. If OK, go to Step 3. If not OK, repair the open circuit to the Power Distribution Center as required.3. Disconnect and isolate the battery negative cable. Access the power lock and remote keyless entry module wire harness connectors as described.4. Unplug the wire harness connectors from the module. Check the connectors and the receptacles in the module for loose, corroded, or damaged
terminals and pins. If OK, go to Step 5. If not OK, repair as required.

5. Probe the ground circuit cavity of the black module wire harness connector and check for continuity to a good ground. There should be continuity.
If OK, go to Step 6. If not OK, repair the circuit to ground as required.

6. Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the black module wire harness connector. If OK,
go to Step 7. If not OK, repair the open circuit to the fuse- block module as required.

7. Probe the door lock switch output (lock) circuit cavity of the black module wire harness connector and check for battery voltage as you actuate
either, or both, lock switch(es) to the Lock position. If OK, go to Step 8. If not OK, repair the open circuit to the lock switch(es) as required.

8. Probe the door lock switch output (unlock) circuit cavity of the black module wire harness connector and check for battery voltage as you actuate
either, or both, lock switch(es) to the Unlock position. If OK, go to Step 9. If not OK, repair the open circuit to the lock switch(es) as required.

9. Check for continuity between the door jamb switch sense circuit cavity of the black module wire harness connector and a good ground with both
the side and the rear cargo doors closed. There should be no continuity until the side or rear cargo doors are opened. Check both the side and reardoors. If OK, go to Step 10. If not OK, repair the open circuit to the door jamb switch(es) or replace the faulty door jamb switch(es) as required.

10. Check for battery voltage at the fused ignition switch output circuit cavity of the blue module wire harness connector with the ignition switch in the
On position. If OK, turn the ignition switch to the Off position and go to Step 11. If not OK, repair the open circuit to the fuseblock module asrequired.

11. Plug the wire harness connectors back into the module. Backprobe the door latch switch sense circuit cavity of the black module wire harness
connector and check for continuity to a good ground. There should be no continuity. Press and release the Unlock button of the remote keylessentry transmitter. There should now be continuity for about thirty seconds. If OK, go to Step 12. If not OK, replace the faulty module.

12. Backprobe the door lock driver circuit cavity of the black module wire harness connector and check for battery voltage as the lock switch is moved
to the Lock position. Repeat the test pressing the Lock button of the transmitter. If OK, go to Step 13. If not OK, replace the faulty module.

13. Still backprobing the door lock driver circuit cavity of the black module wire harness connector, open the side or rear cargo door. Move the lock

switch to the Lock position or press the Lock button of the remote keyless entry transmitter. Now close all of the doors. Within five seconds of theside or rear door(s) closing, there should be battery voltage on the door lock driver circuit. If OK, go to Step 14. If not OK, replace the faultymodule.

14. Backprobe the door unlock driver circuit cavity of the black module wire harness connector and check for battery voltage as the lock switch is
moved to the Unlock position. Repeat the test pressing the Unlock button of the remote keyless entry transmitter. If OK, repair the open circuit tothe lock motor(s) as required. If not OK, replace the faulty module.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Description and Operation > Page 18

Keyless Entry Module: Service and Repair
REMOVAL

1. Disconnect and isolate the battery negative cable.

Instrument Cluster Bezel Remove/Install

2. Remove the six screws that secure the instrument cluster bezel to the instrument panel.3. Pull the bezel off of the upper retaining clips.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Description and Operation > Page 19

RAM 1500 Van V6-3.9L VIN X (1997)

Radio Remove/Install

4. Remove the two radio mounting screws.5. Remove the screw that secures the radio ground strap to the instrument panel above the radio.6. Pull the radio out from the instrument panel far enough to unplug the wire harness connectors and the antenna coaxial cable connector. If equipped
with the Infinity speaker option, also unplug the wire harness connector from the ground terminal on the back of the radio chassis.

7. Remove the radio from the instrument panel.

Power Lock, Remote Keyless Entry Module Remove/Install

8. Reach through the radio opening of the instrument panel and remove the two screws that secure the power lock and RKE module to the dash panel.9. Unplug the two wire harness connectors and remove the module.

10. Reverse the removal procedures to install.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Description and Operation

Power Door Lock Control Module: Description and Operation
SYSTEM OPERATION

Power Lock And Remote Keyless Entry Module (RKE)

The power lock and Remote Keyless Entry module is mounted on the dash panel beneath the instrument panel, above the heater-A/C airdistribution duct and between the two defroster outlets. This module contains the RKE receiver, and the RKE and illuminated entry systemprogram logic. The module also performs as a smart relay for the power door lock, RKE, and illuminated entry systems.

The remote keyless entry receiver has a memory function to retain the vehicle access code of at least one, but no more than two transmitters. Thereceiver is designed to retain the transmitter codes in memory, even if the battery is disconnected.

The module receives inputs from the ignition switch, the power door lock switches, and the side/ rear cargo door jamb switches. It also receivesthe radio signal input from the remote keyless entry transmitter. In response to those inputs, it is programmed to control outputs to the power lockmotors and the courtesy lamp circuits.
The power lock and remote keyless entry module cannot be repaired and, if faulty or damaged, it must be replaced.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Description and Operation > Page 23

Power Door Lock Control Module: Service and Repair
REMOVAL

1. Disconnect and isolate the battery negative cable.

Instrument Cluster Bezel Remove/Install

2. Remove the six screws that secure the instrument cluster bezel to the instrument panel.3. Pull the bezel off of the upper retaining clips.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Description and Operation > Page 24

RAM 1500 Van V6-3.9L VIN X (1997)

Radio Remove/Install

4. Remove the two radio mounting screws.5. Remove the screw that secures the radio ground strap to the instrument panel above the radio.6. Pull the radio out from the instrument panel far enough to unplug the wire harness connectors and the antenna coaxial cable connector. If equipped
with the Infinity speaker option, also unplug the wire harness connector from the ground terminal on the back of the radio chassis.

7. Remove the radio from the instrument panel.

Power Lock, Remote Keyless Entry Module Remove/Install

8. Reach through the radio opening of the instrument panel and remove the two screws that secure the power lock and RKE module to the dash panel.9. Unplug the two wire harness connectors and remove the module.

10. Reverse the removal procedures to install.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Light Relay > Component Information > Locations

Power Distribution Center -- Under The Hood, Near The Brake Master Cylinder

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations

Power Distribution Center -- Under The Hood, Near The Brake Master Cylinder

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations > Page 32

ABS Main Relay: Description and Operation
OPERATION

(ABS)

(HCU)

The Antilock Brake System power relay is located in the engine compartment near the washer fluid reservoir. The relay supplies voltage tothe Hydraulic Control Unit pump motor, front antilock valve solenoids and rear antilock valve solenoids. The relay also provides an inputsignal to the Controller Antilock Brake . This signal tells the CAB that voltage has been supplied to the HCU pump motor.(CAB)

CIRCUIT OPERATION

(CAB)

(PDC)

When the Controller Anti-Lock Brakes grounds the ABS power relay on circuit B116, the relay contacts close and connect circuit A10from fuse 7 in the Power Distribution Center and circuit B120. Circuit A20 from fuse 5 in the fuse block splices to feed the coil side of theABS power relay

From the ABS power relay, circuit B120 splices to power the pump motor and all the solenoids in the front hydraulic valve. Circuit B120 alsosupplies power to the solenoids in the rear hydraulic valve. Additionally, circuit B120 provides an input to cavity 34 of the CAB. The input tellsthe CAB that power has been supplied to the pump motor.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Description and Operation > With Four Wheel Antilock Brakes

Electronic Brake Control Module: Description and OperationWith Four Wheel Antilock Brakes

Controller Antilock Brake

(CAB)

The Controller Antilock Brake is located at the driver's inner fender panel under the battery and battery tray. The module is attached to theforward side of the front antilock valve mounting bracket. The CAB is used to monitor and operate the ABS system. It monitors the brake switch andwheel speed sensors inputs to prepare for possible antilock braking. The CAB controls the antilock valve solenoid operation during all phases of antilockbraking.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Description and Operation > With Four Wheel Antilock Brakes > Page 37

Electronic Brake Control Module: Description and OperationWith Rear Wheel Antilock Brakes

RWAL CAB

GENERAL INFORMATION

(CAB)

The Controller Antilock Brakes is a micro-processor which monitors and controls the ABS brake system operation. It has a 14 terminalconnector to deliver power and ground to the CAB and connect all inputs and outputs associated with the ABS system. The CAB primaryfunctions are:^

Detect wheel locking tendencies.
^ Control the application of brake fluid pressure to the rear brakes during antilock braking.
^

Monitor the Rear Wheel Antilock brake system for proper operation.(RWAL)

^ Perform self-check diagnostics.

(DTC)

The CAB continuously monitors the speed of the differential ring gear by monitoring signals generated by the rear wheel speed sensor. The CABdetermines a wheel locking tendency when it recognizes the ring gear decelerating too rapidly. When a wheel-locking tendency is detected, theCAB energizes the isolation solenoid in the RWAL valve. When the isolation solenoid is energized, hydraulic pressure cannot be increased to therear wheel cylinders. If the rear wheel speed sensor still indicate that the ring gear is decelerating too rapidly, the CAB then energizes the dumpsolenoid to reduce pressure at the rear wheel cylinders. The CAB continues this action until the wheel-locking tendency no longer exists. When afault is detected, the CAB will generate and store diagnostic trouble codes. Only one code can be stored at any one time. If the CAB senses a faultin any one of its monitored circuits, it will illuminate the red brake warning and ABS warning lamps. It will then generate a Diagnostic TroubleCode and store it in memory. In general, the diagnostic trouble code will remain in memory when the ignition key has been turned OFF.The exception to this is codes 9 and 11 which are erased any time the key has been turned OFF. Also, code 11 will be removed from memorywhen the ignition is in the RUN or ACC. positions if the malfunction that caused the code has been eliminated. For both codes 9 and 11, if themalfunction remains, the DTC will be reset on the next ignition key cycle to ON.

CAB INPUTS

The CAB monitors the following inputs to determine when a wheel locking tendency may exists:^

Rear Wheel Speed Sensor
^ Brake Lamp Switch
^ Brake Warning Lamp Switch

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Description and Operation >

With Four Wheel Antilock Brakes > Page 38

RAM 1500 Van V6-3.9L VIN X (1997)

^ Reset Switch

^ 4WD Switch

CAB OUTPUTS

The CAB controls the following outputs for antilock braking and brake warning information:^

RWAL Valve
^ ABS Warning Lamp
^ Brake Warning Lamp

POWER SUPPLY AND GROUND

Ignition voltage is provided to the CAB through pin 3 and is protected by a 20 amp fuse. Ignition voltage is supplied when the ignition switch is inthe RUN or ACC. positions. The CAB requires ignition voltage to be able to operate the function of antilock brakes. Battery voltage is provided tothe CAB through pin 9 and is protected by a 20 amp fuse. This circuit supplies power to the memory cells so that the CAB can retain diagnostic

information. Except for trouble codes 9 and 11, the CAB stores DTCs in the battery fed volatile memory. Volatile memories only retaininformation as long as power is supplied to the memory. If a DTC is stored in the battery fed volatile memory, the DTC can be cleared from thememory by disconnecting the battery supply to the CAB. Trouble codes 9 and 11 are also in a volatile memory but their memories are fed withignition voltage. A ground is provide to the CAB through pin 12 of the 14-way connector. It is required by the CAB to be able to operate any of itscircuits.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Service and Repair > Four Wheel Antilock Brake System

Electronic Brake Control Module: Service and RepairFour Wheel Antilock Brake System
REMOVAL

1. Disconnect the negative battery cable.2. Remove the windshield washer and engine coolant recovery reservoirs.

CAB Harness Connector Locking Handle

CAB Harness Connector

(CAB)

3. Disconnect the Controller Antilock Brake harness connector by pulling up on the connector release handle.4. Remove upper and lower mounting bolts.5. Remove controller from vehicle.

INSTALLATION

1. Install controller into mounting bracket.2. Install upper and lower mounting bolts.3. Install harness connector and pull down on locking handle to lock in place.4. Install the windshield washer and engine coolant recovery reservoirs.5. Connect the negative battery cable.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Service and Repair > Four Wheel Antilock Brake System > Page 41

Electronic Brake Control Module: Service and RepairRear Wheel Antilock Brake System
REMOVAL

1. Remove glove box.2. Remove controller connector.3. Remove controller mounting bolts and remove controller.

INSTALLATION

1. Install controller and mounting bolts.2. Install harness connector to controller.3. Install glove box.

> Relays and Modules > Relays and Modules - HVAC > Blower Motor Relay > Component Information > Locations

Blower Motor Relay: Locations

Fig 30 High Speed (front) Blower Motor Relay

FRONT (HIGH SPEED) BLOWER MOTOR RELAY

The high speed blower motor relay and wire harness connector are secured by a retainer molded into the connector, which is inserted into a hole on theinboard side of the heater-A/C housing near the dash panel in the engine compartment.

REAR BLOWER MOTOR RELAY

The rear blower motor relay and wire harness connector are taped back to the main instrument panel wire harness, just above the right end of theinstrument cluster opening in the instrument panel.

> Relays and Modules > Relays and Modules - HVAC > Blower Motor Relay > Component Information > Locations > Page 46

Blower Motor Relay: Description and Operation
BLOWER MOTOR RELAY

Front

The front blower motor electrical circuit uses a high speed blower motor relay. The high speed blower motor relay is a International StandardsOrganization (ISO)-type relay The relay is a electromechanical device that switches battery current from a fuse in the Power Distribution Center tothe blower motor, bypassing the remainder of the blower motor feed circuit.

The relay is energized when the relay coil is provided a voltage signal by the blower motor switch. When the relay is de-energized, fused ignition-switched battery current is fed from the front blower motor switch to the blower motor resistor and through the normally closed circuit of the relayto control the blower motor speed.

The relay is located in the engine compartment on the inboard side of the heater-A/C housing and near the dash panel. The relay is installed in aconnector in the blower motor wire harness. The connector includes a molded-in plastic retainer that snaps into a hole in the side of the heater-A/Chousing. The relay cannot be repaired and, if faulty or damaged, it must be replaced.

Rear

The rear heater-only or heater-A/C blower motor electrical circuit uses a blower motor relay. The rear blower motor relay is a InternationalStandards Organization (ISO)-type relay. The relay is a electro-mechanical device that switches battery current from a fuse in the PowerDistribution Center to the blower motor switch when the ignition switch is in the On position.

The rear blower motor relay is located under the instrument panel near the right end of the instrument cluster. The relay is taped to the instrumentpanel wire harness. The relay cannot be repaired and, if faulty or damaged, it must be replaced.

> Relays and Modules > Relays and Modules - HVAC > Blower Motor Relay > Component Information > Locations > Page 47

Blower Motor Relay: Testing and Inspection

Blower Motor Relay

Fig 30 High Speed (front) Blower Motor Relay

RELAY TEST

Remove the blower motor relay from its wire harness connector as described to perform the following tests:

1. A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK.
go to Step 2. If not OK, replace the faulty relay

75 +/- 5 ohms

2. Resistance between terminals 85 and 86 (electromagnet) should be . If OK, go to Step 3. If not OK, replace the faulty relay.3. Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A
and 30. If OK, see the Relay Circuit Test procedure. If not OK, replace the faulty relay.

FRONT (HIGH SPEED) BLOWER MOTOR RELAY CIRCUIT TEST

> Relays and Modules > Relays and Modules - HVAC > Blower Motor Relay > Component Information > Locations > Page 48

RAM 1500 Van V6-3.9L VIN X (1997)

1. The relay common feed terminal cavity (30) is connected to the blower motor. This terminal supplies the blower motor with fused battery feed

(PDC)

directly from a fuse in the Power Distribution Center when the relay is energized, and ignition switched battery feed from a fuse in thefuseblock module through the blower motor resistor when the relay is de-energized. There should be continuity between this cavity and the hiblower motor driver circuit cavity of the blower motor wire harness connector at all times. If OK, go to Step 2. If not OK, repair the open circuit asrequired.

2. The relay normally closed terminal cavity (87A) is connected to the blower motor resistor output. When the relay is de-energized, terminal 87A is

connected to terminal 30 and provides the blower motor resistor block output to the hi blower motor driver circuit. There should be continuitybetween this cavity and the blower motor resistor block output circuit cavity of the blower motor resistor wire harness connector at all times. IfOK, go to Step 3. If not OK, repair the open circuit as required.

3. The relay normally open terminal cavity (87) is connected to a fused battery feed from the PDC. When the relay is energized, terminal 87 is
connected to terminal 30 and provides full battery current to the hi blower motor driver circuit. There should be battery voltage at this cavity at alltimes. If OK, go to Step 4. If not OK, repair the open circuit to the PDC as required.

4. The coil battery terminal cavity (86) is connected to fused ignition switch output through the High speed contacts of the blower motor switch.

When the blower motor switch is placed in the high speed position, fused ignition switch output is directed to the relay electromagnetic coil toenergize the relay There should be continuity between the cavity for relay terminal 86 and the blower motor relay driver circuit cavity of theblower motor switch wire harness connector at all times. If OK, go to Step 5. If not OK, repair the open circuit to the blower motor switch asrequired.

5. The coil ground terminal cavity (85) is connected to ground. This terminal supplies the ground for the relay electromagnetic coil. There should be
continuity between the cavity for relay terminal 85 and a good ground at all times. If not OK, repair the open circuit as required.

REAR BLOWER MOTOR RELAY CIRCUIT TEST

1. The relay common feed terminal cavity (30) is connected to fused battery output. There should be battery voltage at this cavity at all times. If OK,
go to Step 2. If not OK, repair the open circuit to the fuseblock module as required.

2. The relay normally closed terminal cavity (87A) is not used in this application, go to Step 3.3. The relay normally open terminal cavity (87) is connected to the rear blower motor switch. There should be continuity between this cavity and the
rear A/C-heater relay output circuit cavity of the rear blower motor switch wire harness connector at all times. If OK, go to Step 4. If not OK,repair the open circuit as required.

4. The coil battery terminal cavity (86) is connected to fused ignition switch output. There should be battery voltage at this cavity with the ignition
switch in the On position. If OK, go to Step 5. If not OK, repair the open circuit as required.

5. The coil ground terminal cavity (85) is connected to ground. There should be continuity to ground at all times. If not OK, repair the circuit to
ground as required.

> Relays and Modules > Relays and Modules - HVAC > Blower Motor Relay > Component Information > Locations > Page 49

Blower Motor Relay: Service and Repair

Fig 30 High Speed (front) Blower Motor Relay

FRONT (HIGH SPEED) BLOWER MOTOR RELAY

The high speed blower motor relay and wire harness connector are secured by a retainer molded into the connector, which is inserted into a hole on theinboard side of the heater-A/C housing near the dash panel in the engine compartment.

1. Disconnect and isolate the battery negative cable.2. Unplug the relay from the wire harness connector.3. To install the relay, align the terminals with the cavities in the relay wire harness connector and push the relay firmly into place.4. Reverse the remaining removal procedures to complete the installation.5. Test the relay operation.

REAR BLOWER MOTOR RELAY

The rear blower motor relay and wire harness connector are taped back to the main instrument panel wire harness, just above the right end of theinstrument cluster opening in the instrument panel.

1. Disconnect and isolate the battery negative cable.2. Remove the instrument cluster from the instrument panel.3. Carefully remove the tape that secures the relay and wire harness connector to the instrument panel main wire harness.4. Unplug the relay from the wire harness connector.5. To install the relay, align the terminals with the cavities in the relay wire harness connector and push the relay firmly into place.6. Tape the relay and wire harness connector back to the instrument panel main wire harness.7. Reverse the remaining removal procedures to complete the installation.8. Test the relay operation.

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Component Locations

Compressor Clutch Relay: Component Locations

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Component Locations > Page 54

RAM 1500 Van V6-3.9L VIN X (1997)

Power Distribution Center -- Under The Hood, Near The Brake Master Cylinder

Fig 19 Power Distribution Center

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Component Locations > Page 55

Pinout

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Page 56

Compressor Clutch Relay: Description and Operation

Fig 19 Power Distribution Center

Compressor Clutch Relay

COMPRESSOR CLUTCH RELAY

The compressor clutch relay is a electro-mechanical device that switches current to the compressor clutch coil when the Powertrain ControlModule (PCM) grounds the coil side of the relay. The PCM responds to inputs from the heater-A/C mode control switch, the low and highpressure cut-off switches, and the fin sensing cycling clutch switch.

(PDC)

The compressor clutch relay is located in the Power Distribution Center in the engine compartment. Refer to the PDC label for relayidentification and location.

The compressor clutch relay is a International Standards Organization (ISO) micro-relay. The terminal designations and functions are the same asa conventional ISO relay. However, the micro-relay terminal orientation (footprint) is different, the current capacity is lower, and the relay casedimensions are smaller than on the conventional ISO relay.

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Page 57

Compressor Clutch Relay: Testing and Inspection

Compressor Clutch Relay

Fig 19 Power Distribution Center

RELAY TEST

1. A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK,
go to Step 2. If not OK, replace the faulty relay.

75 +/-5 ohms

2. Resistance between terminals 85 and 86 (electromagnet) should be . If OK, go to Step 3. If not OK, replace the faulty relay.3. Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A
and 30. If OK, SEE the Relay Circuit Test. If not OK, replace the faulty relay.

RELAY CIRCUIT TEST

1. The relay common feed terminal cavity (30) is connected to fused battery feed. There should be battery voltage at the cavity for relay terminal 30
at all times. If OK, go to Step 2. If not OK, repair the open circuit to the PDC fuse as required.

2. The relay normally closed terminal (87A) is not used in this application. Go to Step 3.3. The relay normally open terminal cavity (87) is connected to the compressor clutch coil. There should be continuity between this cavity and the

(PDC)

The compressor clutch relay is located in the Power Distribution Center . Refer to the PDC label for relay identification and location. Remove therelay from the PDC to perform the following tests:

A/C compressor clutch relay output circuit cavity of the compressor clutch coil wire harness connector. If OK, go to Step 4. If not OK, repair theopen circuit as required.

4. The relay coil battery terminal (86) is connected to the fused ignition switch output (run/start) circuit. There should be battery voltage at the cavity
for relay terminal 86 with the ignition switch in the On position. If OK, go to Step 5. If not OK, repair the open circuit to the fuse block module asrequired.

5. The coil ground terminal cavity (85) is switched to ground through the Powertrain Control Module (PCM). There should be continuity between
this cavity and the A/C compressor clutch relay control circuit cavity of the PCM wire harness connector C (gray) at all times. If not OK, repair theopen circuit as required.

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Page 58

Compressor Clutch Relay: Service and Repair

Fig 19 Power Distribution Center

(PDC)

1. Disconnect and isolate the battery negative cable.2. Remove the cover from the Power Distribution Center .3. Refer to the label on the PDC for compressor clutch relay identification and location.4. Unplug the compressor clutch relay from the PDC.5. Install the compressor clutch relay by aligning the relay terminals with the cavities in the PDC and pushing the relay firmly into place.6. Install the PDC cover.7. Connect the battery negative cable.8. Test the relay operation.

> Relays and Modules > Relays and Modules - Instrument Panel > ABS Light Relay > Component Information > Locations

Power Distribution Center -- Under The Hood, Near The Brake Master Cylinder

> Relays and Modules > Relays and Modules - Instrument Panel > Audible Warning Device Control Module > Component Information > Testing and Inspection

Audible Warning Device Control Module: Testing and Inspection

See Body Control Module.

> Relays and Modules > Relays and Modules - Instrument Panel > Key Reminder Relay > Component Information > Locations

Key Reminder Relay: Locations

Fuse Block (Part 1 Of 2)

> Relays and Modules > Relays and Modules - Instrument Panel > Key Reminder Relay > Component Information > Locations > Page 69

RAM 1500 Van V6-3.9L VIN X (1997)

Fuse Block (Part 2 Of 2)

> Relays and Modules > Relays and Modules - Instrument Panel > Key Reminder Relay > Component Information > Locations > Page 70

Key Reminder Relay: Description and Operation
CIRCUIT OPERATION

The time delay relay is used to allow a time-ON function for the ignition switch lamp and the headlamp switch lamp. Power for the relay isprovided on the M11 circuit from the interior lamp defeat switch.

Circuit M2 provides ground for the time delay relay through the door ajar switches, headlamp switch and the power door lock module. When adoor is opened, or the headlamp switch is moved to the dome lamp position, a ground path is provided for the relay on circuit M2. This energizesthe relay, causing the contacts to close.

When the relay contacts close, power is provided through the relay to circuit M50. Circuit M50 supplies current to the ignition switch key-in halolamp and the headlamp switch lamp. Circuit Z1 provides ground for the lamps. Circuit Z1 also provides ground for the cigar lighter lamp, andglove box lamp.

> Relays and Modules > Relays and Modules - Lighting and Horns > Daytime Running Lamp Control Unit > Component Information > Description and Operation

Daytime Running Lamp Control Unit: Description and Operation
CIRCUIT OPERATION - CANADA

On Canadian vehicles, the low-beam headlamps operate when the ignition switch is in the RUN position and the headlamp switch is OFF.

(PDC)

When the ignition switch is in the START or RUN position, circuit A1 from fuse 16 in the Power Distribution Center connects to circuitA21. Circuit A21 powers circuit F18 through fuse 19 in the fuse block. Circuit F18 feeds the DRL module.
Circuit L20 from the headlamp switch connects to DRL module. Circuit L20 is HOT at all times.

The DRL module receives the vehicle speed sensor input from circuit G7. Circuit G34 from the DRL module provides power for the high beamindicator lamp in the instrument cluster.

Circuit L4 powers the low beams of the headlamps. When the headlamp switch is OFF, the DRL module powers the low beams on circuit L4.When the headlamps are ON, the multi-function switch powers the low beams on circuit L4

Circuit L3 feeds the high beams of the headlamps. When the operator flashes the headlamps with the stalk of the multi-function switch, the DRLmodule senses voltage on circuit L3. When it senses voltage on circuit L3, the DRL module stops supplying power to the low beams on circuit L4.
Circuit Z1 provides ground for the DRL module.

> Relays and Modules > Relays and Modules - Lighting and Horns > Hazard Flasher Relay > Component Information > Service and Repair

Hazard Flasher Relay: Service and Repair
REMOVAL

1. Remove the glove box bin as described.

Relay And Flasher Module

2. The relay and flasher module is located to the right of the glove box opening. It is snap-fit onto a single blade-type mounting bracket secured to the
right cowl side inner panel. Lift the module upwards to unsnap it from the bracket.

3. Reverse the removal procedures to install.

> Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component Information > Description and Operation

Horn Relay: Description and Operation
SYSTEM OPERATION

The horn relay is a electromechanical device that switches current to the horn when the horn switch on the steering wheel is depressed.

The horn relay is located in the relay and flasher module. The relay and flasher module is mounted to a bracket that is secured to the cowl sideinner panel behind the right end of the instrument panel. The relay and flasher module is accessed by removing the glove box bin.If a problem is encountered with a continuously sounding horn, it can usually be quickly resolved by removing the horn relay from the PDC untilfurther diagnosis is completed. The horn relay cannot be repaired and, if faulty, it must be replaced.

> Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component Information > Description and Operation > Page 81

Horn Relay: Testing and Inspection

Horn Relay

Relay Tests

The horn relay is located in the relay and flasher module. The relay and flasher module is mounted on a bracket that is secured to the cowl side innerpanel behind the right end of the instrument panel. The relay and flasher module is accessed by removing the glove box bin.
Remove the horn relay from the relay and flasher module as described to perform the following tests:

1. A relay in the de-energized position should have continuity between terminals 1 and 3, and no continuity between terminals 2 and 3. If OK, go to
Step 2. If not OK, replace the faulty relay.

2. Connect a battery to terminals 1 and 3. There should now be continuity between terminals 2 and 3. If OK, see the Relay Circuit Tests procedure. If
not OK, replace the faulty relay.

Relay Circuit Tests

1. The relay coil battery terminal cavity 3. is connected to battery voltage and should be hot at all times. If OK, go to Step 2. If not OK, repair the
open circuit to the PDC fuse as required.

2. The relay output terminal 2. is connected to the coil battery terminal 3. in the energized position. This terminal supplies battery voltage to the
horn(s). There should be continuity between the cavity for relay terminal 2 and the horn relay output cavity of the wire harness connector for eachhorn at all times. If OK, go to Step 3. If not OK, repair the open circuit to the horn(s) as required.

3. The relay coil ground terminal 1. is connected to the electromagnet in the relay It is grounded through the horn switch when the horn switch is
depressed. Check for continuity to ground at the cavity for relay terminal 1. There should be continuity with the horn switch depressed, and nocontinuity with the horn switch released. If not OK, see the Horn Switch testing procedure.

> Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component Information > Description and Operation > Page 82

Horn Relay: Service and Repair
REMOVAL AND INSTALLATION

1. Disconnect and isolate the battery negative cable.2. Open the glove box door and remove the glove box bin.

Relay And Flasher Module

3. The relay and flasher module is located to the right of the glove box opening. The module is snap-fit onto a single blade-type mounting bracket
that is secured to the right cowl side inner panel. Lift the module upwards to remove it from the bracket and pull it far enough into the glove boxopening to access the horn relay.

Horn Relay Remove/Install

4. Unplug the horn relay from the relay and flasher module.5. Install the horn relay by aligning the relay terminals with the cavities in the relay and flasher module and pushing the relay firmly into place.6. Install the relay and flasher module onto the mounting bracket.7. Install the glove box bin.8. Connect the battery negative cable.9. Test the relay operation.

> Relays and Modules > Relays and Modules - Power and Ground Distribution > Power Distribution Relay > Component Information > Description and Operation

Power Distribution Relay: Description and Operation
Van Conversion Relay

CIRCUIT OPERATION

Circuit A12 from the van conversion relay is powered when the ignition switch is in the ACCESSORY or RUN positions. The relay provides apower source for aftermarket accessories.

(PDC)

When the ignition switch is in the ACCESSORY or RUN positions it connects circuit A1 from fuse 16 in the Power Distribution Center with circuit A31. Circuit A31 connects to the fuse block and powers circuit L5 through fuse 12. Circuit L5 splices to the coil side of the vanconversion relay Circuit Z1 provides ground for the coil side of the relay.

When battery voltage is present on circuit L5, the relay contacts close and connect circuit A12 to circuit A18 from the fuse in cavities 9 and 10 inthe fuse block.

> Relays and Modules > Relays and Modules - Power and Ground Distribution > Relay Box > Component Information > Service and Repair

Relay Box: Service and Repair
REMOVAL

1. Remove the glove box bin as described.

Relay And Flasher Module

2. The relay and flasher module is located to the right of the glove box opening. It is snap-fit onto a single blade-type mounting bracket secured to the
right cowl side inner panel. Lift the module upwards to unsnap it from the bracket.

3. Reverse the removal procedures to install.

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine Control Module] > Component Information >

Technical Service Bulletins > Customer Interest: > 18-13-97A > Jun > 97 > PCM - Cold Engine Idle Fluctuation

Powertrain Control Module: Customer InterestPCM - Cold Engine Idle Fluctuation

NO: 18-13-97 Rev.A
GROUP: Vehicle Performance
DATE: Jun. 13, 1997

SUBJECT: Cold Engine Idle Fluctuation

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-13-97 DATED MAR. 14, 1997 WHICH SHOULD BE REMOVED FROMYOUR FILES. ALL CHANGES ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES PART NUMBER AND MODEL ADDITIONS.

MODELS:**1997

(AB) Ram Van/Wagon **
1997 (AN) Dakota
**1997 (BR) Ram Truck**

NOTE:

THIS BULLETIN APPLIES TO 1997 VEHICLES WITH A 3.9L ENGINE BUILT PRIOR TO THE FOLLOWING DATES: (AB) JUN. 2, 1997(MDH 0602XX), (AN) FEB. 19, 1997 (MDH 0219XX) (BR) JUN. 2, 1997 (MDH 0602XX).

SYMPTOM/CONDITION:

The vehicle may exhibit an idle fluctuation following a cold engine start. This condition is most noticeable while the transmission selector is in either thepark or neutral position. The incidence for idle fluctuation increases with lower engine start temperatures and is less likely to occur in a warm engine.
DIAGNOSIS:

Verify that the vehicle engine and powertrain control module are close to ambient temperature. Set the vehicle parking brake, place the transmissionselector in Park or Neutral, and start the engine. Without giving the engine any throttle assist, allow time for the fuel system to enter "closed loop" fuelcontrol and warm to normal operating temperatures. The engine idle speed should gradually decrease as the engine warms. If the engine exhibits idlefluctuation during engine warm-up, perform the Repair Procedure.

PARTS REQUIRED:
REPAIR PROCEDURE:
This bulletin involves replacing the Powertrain Control Module (PCM) with revised parts.

1. Following service manual procedures, replace the PCM.

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine

Control Module] > Component Information > Technical Service Bulletins > Customer Interest: > 18-13-97A > Jun > 97 > PCM - Cold Engine Idle Fluctuation > Page 100

RAM 1500 Van V6-3.9L VIN X (1997)

NOTE:

THE FOLLOWING STEPS ARE REQUIRED BY LAW.

2. Type the necessary information on the Authorized Modification Label p/n 04275086. Attach the label near the VECI Label.
POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:Labor Operation No:

08-19-03-92 0.7 Hrs.

FAILURE CODE: P8 - New Part

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine Control Module] > Component Information >

Technical Service Bulletins > All Technical Service Bulletins for Powertrain Control Module: > 18-21-98 > Jun > 98 > Powertrain Control Module - Service Precaution

Powertrain Control Module: All Technical Service BulletinsPowertrain Control Module - Service Precaution

NO: 18-21-98
GROUP: Vehicle Performance
DATE: Jun. 5, 1998
SUBJECT:

Powertrain ControlModule (PCM)Service Caution
MODELS:

1996 - 1998 (AB) Ram Van
1996 - 1998 (AN) Dakota
1996 - 1998 (BR/BE) Ram Truck
1998 (DN) Durango
1997 - 1998 (TJ) Wrangler
1996-1998 (XJ) Cherokee
1996-1998 (ZJ) Grand Cherokee
1996 - 1998 (ZG) Grand Cherokee (European Market)

DISCUSSION:

Whenever any connector on the PCM is disconnected, the ignition switch must be in the "OFF" position for a minimum of 5 seconds before connectorremoval.

It has been found under certain key "ON" or momentary key "OFF" conditions, when the black connector is unplugged, the PCM may attempt to writeinformation to the EEPROM processor within the PCM. Sometimes this inadvertent write will set the target charging voltage to 0 (zero) volts. The resultwill prevent the charging system from charging the battery.
If this occurs, the only correction is PCM replacement.

POLICY: Information Only

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine Control Module] > Component Information >

Technical Service Bulletins > All Technical Service Bulletins for Powertrain Control Module: > 18-13-97A > Jun > 97 > PCM - Cold Engine Idle Fluctuation

Powertrain Control Module: All Technical Service BulletinsPCM - Cold Engine Idle Fluctuation

NO: 18-13-97 Rev.A
GROUP: Vehicle Performance
DATE: Jun. 13, 1997

SUBJECT: Cold Engine Idle Fluctuation

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-13-97 DATED MAR. 14, 1997 WHICH SHOULD BE REMOVED FROMYOUR FILES. ALL CHANGES ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES PART NUMBER AND MODEL ADDITIONS.

MODELS:**1997

(AB) Ram Van/Wagon **
1997 (AN) Dakota
**1997 (BR) Ram Truck**

NOTE:

THIS BULLETIN APPLIES TO 1997 VEHICLES WITH A 3.9L ENGINE BUILT PRIOR TO THE FOLLOWING DATES: (AB) JUN. 2, 1997(MDH 0602XX), (AN) FEB. 19, 1997 (MDH 0219XX) (BR) JUN. 2, 1997 (MDH 0602XX).

SYMPTOM/CONDITION:

The vehicle may exhibit an idle fluctuation following a cold engine start. This condition is most noticeable while the transmission selector is in either thepark or neutral position. The incidence for idle fluctuation increases with lower engine start temperatures and is less likely to occur in a warm engine.
DIAGNOSIS:

Verify that the vehicle engine and powertrain control module are close to ambient temperature. Set the vehicle parking brake, place the transmissionselector in Park or Neutral, and start the engine. Without giving the engine any throttle assist, allow time for the fuel system to enter "closed loop" fuelcontrol and warm to normal operating temperatures. The engine idle speed should gradually decrease as the engine warms. If the engine exhibits idlefluctuation during engine warm-up, perform the Repair Procedure.

PARTS REQUIRED:
REPAIR PROCEDURE:
This bulletin involves replacing the Powertrain Control Module (PCM) with revised parts.

1. Following service manual procedures, replace the PCM.

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine

Control Module] > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Powertrain Control Module: > 18-13-97A > Jun > 97 > PCM -

Cold Engine Idle Fluctuation > Page 110

RAM 1500 Van V6-3.9L VIN X (1997)

NOTE:

THE FOLLOWING STEPS ARE REQUIRED BY LAW.

2. Type the necessary information on the Authorized Modification Label p/n 04275086. Attach the label near the VECI Label.
POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:Labor Operation No:

08-19-03-92 0.7 Hrs.

FAILURE CODE: P8 - New Part

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine Control Module] > Component Information >

Technical Service Bulletins > All Technical Service Bulletins for Powertrain Control Module: > 080197 > Feb > 97 > PCM - Wire Harness Connector Repair Package

Technical Service Bulletin # 080197

Discussion

NO: 08-01-97
GROUP: Electrical
EFFECTIVE DATE: Feb. 3, 1997

SUBJECT:JTEC Powertrain ControlModule Wiring HarnessConnector Repair Packages
MODELS:

1996 - 1997 (AB) Ram Van
1996 - 1997 (AN) Dakota
1996 - 1997 (BR) Ram Truck
1996 - 1997 (SR) Viper/Viper GTS
1997 (TJ) Wrangler
1996-1997 (XJ) Cherokee
1996-1997 (ZJ) Grand Cherokee
1996 - 1997 (ZG) Grand Cherokee (International Markets)

DISCUSSION:

The following Jeep/Truck Engine Controller (JTEC) Powertrain Control Module (PCM) electrical connector and terminal repair components areavailable to aid in powertrain electrical wiring repairs. These components allow repairs of individual wiring circuits without the need to replace the entireengine harness. If you have determined that a powertrain customer complaint could be related to a poor electrical connection, the PCM connectorsshould be inspected. The following diagnosis and inspection can be utilized to determine the condition of the PCM connectors and their terminals.

Diagnosis

Inspection of the connector begins with a thorough inspection of the insulator.

1. Record the radio station presets.

2. Disconnect and isolate the battery negative cable (both batteries should be disconnected if the vehicle is equipped with a 5.9L Cummins Diesel).

3. Disconnect the connector from the PCM.

> Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Powertrain Control Module <--> [Engine

Control Module] > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Powertrain Control Module: > 080197 > Feb > 97 > PCM -

Wire Harness Connector Repair Package > Page 115

RAM 1500 Van V6-3.9L VIN X (1997)

4. Inspect the connector lock tab on the side of the insulator (Figure 1) for damage and replace the insulator if damaged is identified.

5. Gently pull on the wires of the connector one at a time. The initial and final locks will need to be inspected if the wire pulls out of the insulator.

6. Push in the single lock tab on the side of the insulator (Figure 2).